Examine source code of TuxDarkTheme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "TuxDarkTheme3",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.18)",
      "toolbar_text": "rgb(195, 195, 195)",
      "frame": "rgb(62, 62, 62)",
      "tab_background_text": "rgb(195, 195, 195)",
      "toolbar_field": "rgba(13, 13, 13, 0.57)",
      "toolbar_field_text": "rgb(195, 195, 195)",
      "tab_line": "rgb(195, 195, 195)",
      "popup": "rgb(62, 62, 62)",
      "popup_text": "rgb(195, 195, 195)",
      "button_background_active": "rgb(195, 195, 195)",
      "frame_inactive": "rgb(62, 62, 62)",
      "icons_attention": "rgb(195, 195, 195)",
      "ntp_background": "rgb(62, 62, 62)",
      "ntp_text": "rgb(195, 195, 195)",
      "popup_border": "rgba(195, 195, 195, 0.79)",
      "tab_selected": "rgba(195, 195, 195, 0.36)",
      "tab_loading": "rgb(195, 195, 195)"
    }
  }
}